JP3179115B2 - Improved evaporator - Google Patents
Improved evaporatorInfo
- Publication number
- JP3179115B2 JP3179115B2 JP00103591A JP103591A JP3179115B2 JP 3179115 B2 JP3179115 B2 JP 3179115B2 JP 00103591 A JP00103591 A JP 00103591A JP 103591 A JP103591 A JP 103591A JP 3179115 B2 JP3179115 B2 JP 3179115B2
- Authority
- JP
- Japan
- Prior art keywords
- anesthetic
- passage
- regulator
- evaporator
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000003444 anaesthetic effect Effects 0.000 claims description 44
- 239000012159 carrier gas Substances 0.000 claims description 14
- 238000001704 evaporation Methods 0.000 claims description 13
- 230000008020 evaporation Effects 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000006837 decompression Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000009835 boiling Methods 0.000 description 9
- 229940035674 anesthetics Drugs 0.000 description 4
- 239000003193 general anesthetic agent Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000006200 vaporizer Substances 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 1
- LVZWSLJZHVFIQJ-UHFFFAOYSA-N Cyclopropane Chemical compound C1CC1 LVZWSLJZHVFIQJ-UHFFFAOYSA-N 0.000 description 1
- PIWKPBJCKXDKJR-UHFFFAOYSA-N Isoflurane Chemical compound FC(F)OC(Cl)C(F)(F)F PIWKPBJCKXDKJR-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- DPYMFVXJLLWWEU-UHFFFAOYSA-N desflurane Chemical compound FC(F)OC(F)C(F)(F)F DPYMFVXJLLWWEU-UHFFFAOYSA-N 0.000 description 1
- JPGQOUSTVILISH-UHFFFAOYSA-N enflurane Chemical compound FC(F)OC(F)(F)C(F)Cl JPGQOUSTVILISH-UHFFFAOYSA-N 0.000 description 1
- 229960000305 enflurane Drugs 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- DLEGDLSLRSOURQ-UHFFFAOYSA-N fluroxene Chemical compound FC(F)(F)COC=C DLEGDLSLRSOURQ-UHFFFAOYSA-N 0.000 description 1
- 229950010045 fluroxene Drugs 0.000 description 1
- BCQZXOMGPXTTIC-UHFFFAOYSA-N halothane Chemical compound FC(F)(F)C(Cl)Br BCQZXOMGPXTTIC-UHFFFAOYSA-N 0.000 description 1
- 229960003132 halothane Drugs 0.000 description 1
- 229960002725 isoflurane Drugs 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- RFKMCNOHBTXSMU-UHFFFAOYSA-N methoxyflurane Chemical compound COC(F)(F)C(Cl)Cl RFKMCNOHBTXSMU-UHFFFAOYSA-N 0.000 description 1
- 229960002455 methoxyflurane Drugs 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 229960002415 trichloroethylene Drugs 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
- A61M16/18—Vaporising devices for anaesthetic preparations
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
- A61M16/147—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase the respiratory gas not passing through the liquid container
Landscapes
- Health & Medical Sciences (AREA)
- Anesthesiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Control Of Fluid Pressure (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Catching Or Destruction (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は麻酔剤蒸発装置に関す
る。The present invention relates to an anesthetic evaporator.
【０００２】[0002]
【従来技術および発明が解決しようとする課題】英国特
許１２２４４７８号はバイパス型の麻酔剤蒸発装置を述
べており、この装置では、酸素、空気又は亜酸化窒素の
ようなキャリヤガスを蒸発装置への入口で初めに分割し
て、含まれる揮発性の液状麻酔剤から蒸気を同伴するた
めに蒸発装置の溜め部すなわち蒸発室へ差し向けられる
第１の流れと、第２のバイパス流れとにし、次いでこれ
らの第１および第２の流れは患者への送給のために蒸発
装置を去る前に再び合流する。BACKGROUND OF THE INVENTION GB 1 224 478 describes a bypass-type anesthetic evaporator in which a carrier gas such as oxygen, air or nitrous oxide is supplied to the evaporator. First split at the inlet into a first stream directed to a reservoir or evaporation chamber of the evaporator to entrain vapor from the contained volatile liquid anesthetic, and a second bypass stream, then These first and second streams merge again before leaving the evaporator for delivery to the patient.
【０００３】この公知な蒸発装置はハロセイン、トリク
ロロエチレン、およびエンフルラン、フルオロキセン、
メトキシフルランおよびイソフルランを含むエーテル誘
導体のような麻酔剤を送給するために多年にわたって首
尾よく使用されてきた。上記麻酔剤すべては大気圧で４
０℃より十分に高い沸点を有している。[0003] This known evaporator comprises halothane, trichloroethylene, and enflurane, fluoroxene,
It has been used successfully for many years to deliver anesthetics such as ether derivatives including methoxyflurane and isoflurane. All of the above anesthetics are 4 at atmospheric pressure
It has a boiling point well above 0 ° C.
【０００４】ところが、新規な麻酔剤、すなわち、大気
圧で２０℃と２５℃との間の沸点を有する２−（ジフル
オロメトキシ）−１，１，１，２−テトラフルオロエタ
ンが開発された。この２−（ジフルオロメトキシ）−
１，１，１，２−テトラフルオロエタンの物理により、
既存の麻酔剤蒸発装置はこの麻酔剤を患者に送給するの
に不適当になった。However, new anesthetics have been developed, namely 2- (difluoromethoxy) -1,1,1,2-tetrafluoroethane, which has a boiling point between 20 ° C. and 25 ° C. at atmospheric pressure. This 2- (difluoromethoxy)-
By the physics of 1,1,1,2-tetrafluoroethane,
Existing anesthetic vaporizers have become unsuitable for delivering this anesthetic to patients.
【０００５】本発明の目的は大気圧でほぼ２０℃の沸点
を有する所定濃度の麻酔剤を患者に送給することができ
る麻酔剤蒸発装置を提供することである。It is an object of the present invention to provide an anesthetic vaporizer capable of delivering a predetermined concentration of anesthetic having a boiling point of about 20 ° C. at atmospheric pressure to a patient.
【０００６】[0006]
【課題を解決するための手段】本発明によれば、麻酔剤
蒸発装置は、キャリヤガス用の入口と、キャリヤガスお
よびガス状麻酔剤を患者に送給するための出口と、入口
と出口との間に延び、流れ制限装置を位置決めした第１
通路と、流れ制限装置の上流の位置における第１通路と
調整器との間に延びる第２通路とを備え、調整器は、麻
酔剤を収容する蒸発室から流れ制限器の下流の位置にお
ける第１通路まで延びる第３通路を通って流れるときに
ガス状麻酔剤の圧力を制御するようになっており、第３
通路には、流量制御弁が位置決めされていることを特徴
とする。According to the present invention, an anesthetic evaporator includes an inlet for a carrier gas, an outlet for delivering the carrier gas and gaseous anesthetic to a patient, an inlet and an outlet. Between the first and second flow restricting devices.
A passageway and a second passageway extending between the first passageway and the regulator at a location upstream of the flow restrictor, wherein the regulator is second from a vaporization chamber containing the anesthetic at a location downstream of the flowrestrictor. Controlling the pressure of the gaseous anesthetic when flowing through a third passage extending to one passage;
A flow control valve is positioned in the passage.
【０００７】[0007]
【実施例】添付図面を参照して本発明の実施例を以下に
説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【０００８】まず図１および図２を参照すると、麻酔剤
蒸発装置１はキャリヤガス用の入口２と、キャリヤガス
およびガス状麻酔剤用の出口４とを有している。入口２
と出口４との間には、通路６が延びており、この通路６
には、層流バイパス制限装置８が位置決めされている。
この制限装置８はその作動流れ範囲にわたって層流特性
を示す。Referring first to FIGS. 1 and 2, an anesthetic evaporator 1 has an inlet 2 for a carrier gas and an outlet 4 for a carrier gas and a gaseous anesthetic. Entrance 2
A passage 6 extends between the passage 6 and the outlet 4.
, The laminar flow bypass restricting device 8 is positioned.
This restriction device 8 exhibits laminar flow characteristics over its operating flow range.
【０００９】通路６からは、第２通路１０が制限装置８
の上流の位置から延びており、この第２通路１０は平衡
調整器１４の第１室１６と連通している。平衡調整器１
４はダイヤフラム２０により第１室１６から分離されて
いる第２室１８を有している。ダイヤフラム２０には、
弁座２４と協働する弁ガサ２２がダイヤフラム２０とと
もに移動可能に連結されている。弁ガサ２２および弁座
２４は蒸発室１２に収容されたガス状麻酔剤の流れを制
御する。From the passage 6, a second passage 10 is connected to the restriction device 8
The second passage 10 communicates with a first chamber 16 of the balance adjuster 14. Balance adjuster 1
4 has a second chamber 18 separated from the first chamber 16 by a diaphragm 20. In the diaphragm 20,
A valve gasket 22 cooperating with a valve seat 24 is movably connected together with the diaphragm 20. The valve gas 22 and the valve seat 24 control the flow of the gaseous anesthetic contained in the evaporation chamber 12.
【００１０】通路２６が第２室１８から制限装置８の下
流の通路６まで延びている。通路２６には、層流制御弁
２８が位置決めされている。蒸発装置１はヒータ３２を
有しており、このヒータ３２は温度検知装置（図示せ
ず）により制御される。しかし、変更例では、ヒータ３
２は蒸発室１２内の麻酔剤の圧力を検知するための装置
により制御することができる。A passage 26 extends from the second chamber 18 to the passage 6 downstream of the restriction device 8. A laminar flow control valve 28 is positioned in the passage 26. The evaporator 1 has a heater 32, which is controlled by a temperature detector (not shown). However, in the modified example, the heater 3
2 can be controlled by a device for detecting the pressure of the anesthetic in the evaporation chamber 12.
【００１１】使用に際、エネルギをヒータ３２に供給
し、それにより麻酔剤を液体から蒸発室１２の上部（図
示の如く）に収容されるガス状態へ転化する。次いで、
キャリヤガスが入口２に入り、制限装置８を通って出口
４に向けて通路６に沿って流れ続ける。制限装置８の上
流の圧力は入口２に入るキャリヤガスの流量により決ま
る。平衡調整器１４の第１室１６内の圧力は第２通路１
０のため、制限装置８の上流の圧力と同じである。これ
により、ダイヤフラム２０は弁ガサ２２とともに上方
（図示の如く）に移動する。かくして、弁ガサ２２は弁
座から離れ、それによりガス状麻酔剤は蒸発室１２を去
り、第２室１８を通って通路２６に入ることができ、つ
いには通路２６内の圧力が室１６内の圧力と同じにな
る。制限装置８の上流の通路６内の圧力と制御弁２８の
上流の通路２６内の圧力とは同じである。制御弁２８の
いずれの位置でも、ガス状麻酔剤の流量は上記圧力によ
り、従って入口２でのキャリヤガスの流量により決ま
る。これにより、キャリヤガスの流量が増大すると、麻
酔剤の流量が増大し、また、その逆もまた同様であり、
従って患者に送られるガス中の麻酔剤の重量％濃度は一
定のままである。In use, energy is supplied to the heater 32, thereby converting the anesthetic from a liquid to a gaseous state contained in the upper portion of the evaporation chamber 12 (as shown). Then
Carrier gas enters the inlet 2 and continues to flow along the passage 6 through the restrictor 8 toward the outlet 4. The pressure upstream of the restriction 8 is determined by the flow rate of the carrier gas entering the inlet 2. The pressure in the first chamber 16 of the balance adjuster 14
Because it is 0, it is the same as the pressure upstream of the restriction device 8. As a result, the diaphragm 20 moves upward (as shown) together with the valve gasket 22. Thus, the valve fill 22 separates from the valve seat so that the gaseous anesthetic can leave the evaporating chamber 12 and enter the passage 26 through the second chamber 18, until the pressure in the passage 26 rises within the chamber 16. Pressure. The pressure in the passage 6 upstream of the restriction device 8 and the pressure in the passage 26 upstream of the control valve 28 are the same. At any position of the control valve 28, the flow rate of the gaseous anesthetic is determined by the pressure and thus by the flow rate of the carrier gas at the inlet 2. Thus, when the flow rate of the carrier gas increases, the flow rate of the anesthetic increases, and vice versa.
Thus, the weight percent concentration of the anesthetic in the gas delivered to the patient remains constant.
【００１２】次いで、ガス状麻酔剤は蒸発装置の出口４
を去る前に通路６内のキャリヤビスと合流する。Next, the gaseous anesthetic is supplied to the outlet 4 of the evaporator.
Merges with the carrier screw in the passage 6 before leaving.
【００１３】当業界で知られているように、上記のよう
に出口４を去るキャリヤガス中のガス状麻酔剤の濃度は
層流制御弁２８の設定により制御される。As is known in the art, the concentration of gaseous anesthetic in the carrier gas leaving outlet 4 as described above is controlled by the setting of laminar flow control valve 28.
【００１４】弁ガサ２２および協働弁座２４の外形は、
１５リットル／分までのキャリヤガスの流量で通路２６
内のガス状麻酔剤の圧力が入口２に入るキャリヤガスの
圧力に等しくなるような形状になっている。The outer shapes of the valve gasket 22 and the cooperating valve seat 24 are as follows.
Passage 26 at carrier gas flow rates up to 15 l / min
It is shaped such that the pressure of the gaseous anesthetic therein is equal to the pressure of the carrier gas entering the inlet 2.
【００１５】図３乃至図６を参照して説明するが、同一
参照番号は図１および図２を参照して説明した部分と同
じ部分を示している。Referring to FIGS. 3 to 6, the same reference numerals indicate the same parts as those described with reference to FIGS.
【００１６】特に図３を参照して説明すると、−３２℃
の沸点を有するシクロプロパンのような非常に低い沸点
の麻酔剤の場合、２２℃での蒸発室１２内の麻酔剤の圧
力は７５ psi位に非常に高い。この高い圧力に対処する
ために、蒸発室１２と平衡調整器１４との間には、第２
減圧調整器３０が位置決めされている。Referring particularly to FIG.
For very low boiling anesthetics, such as cyclopropane, having a boiling point of, the pressure of the anesthetic in the evaporation chamber 12 at 22 ° C is very high, on the order of 75 psi. In order to cope with this high pressure, a second space is provided between the evaporation chamber 12 and the balance controller 14.
The decompression regulator 30 is positioned.
【００１７】特に図４を参照して説明すると、蒸発室１
２内の圧力を確保するために麻酔剤の沸点が約周囲温度
であるとき、麻酔剤の温度をその沸点より上まで上昇さ
せるためにヒータ３２が設けられている。図４に示す実
施例では、ヒータ３２は、蒸発室１２同様、通路６、１
０、２６および調整器も加熱されて蒸発室より冷たい蒸
発装置の壁部への麻酔剤の凝縮を止めように蒸発装置内
に位置決めされている。Referring specifically to FIG. 4, the evaporating chamber 1
A heater 32 is provided to raise the temperature of the anesthetic to above its boiling point when the boiling point of the anesthetic is at about ambient temperature to ensure the pressure in 2. In the embodiment shown in FIG.
The 0, 26 and regulators are also heated and positioned in the evaporator to stop condensation of the anesthetic on the walls of the evaporator, which is cooler than the evaporator chamber.
【００１８】ヒータ３２は温度検知装置（図示せず）に
より制御される。The heater 32 is controlled by a temperature detector (not shown).
【００１９】図５には、変更例が示されており、この変
更例は、第２調整器１４′を調整器１４と直列に設けて
あるという点で、調整器１４が万一機能不全になった場
合に追加の安全性をもたらす。図示のように、通路６か
らは、通路１０が調整器１４まで延びており、別の通路
１０′が調整器１４′まで延びている。FIG. 5 shows a modification which, in the event that the second regulator 14 'is provided in series with the regulator 14, causes the regulator 14 to malfunction. Bringing extra security in the event of As shown, from passage 6, passage 10 extends to regulator 14, and another passage 10 'extends to regulator 14'.
【００２０】更に追加の安全手段として、圧力装置（図
示せず）が設けられ、この圧力装置は通路６、２６間に
配置され、調整器１４の性能を監視するように構成され
ている。この圧力装置は、例えば、調整器の弁ガサ２２
が開いて動かなくなり、設定値より高い濃度の麻酔剤が
出口４へ送られている状態を自動的に検出する。As an additional safety measure, a pressure device (not shown) is provided which is arranged between the passages 6, 26 and is adapted to monitor the performance of the regulator 14. This pressure device is, for example,
Is opened to stop moving, and automatically detects a state in which an anesthetic at a concentration higher than the set value is being sent to the outlet 4.
【００２１】最後に、図６を参照すると、蒸発装置１は
入口２に隣接して通路６から蒸発室１２まで延びている
バイパス通路４０を有している。この通路４０には、一
方向弁４２が位置決めされている。更らに、通路６に
は、図示のように定背圧調整器４４が位置決めされてい
る。１５℃〜３５℃ほどの通常の作動温度範囲内で沸点
が周囲温度、例えば、２０℃より高い麻酔剤を使用する
ことが必要である場合、周囲温度がこの沸点より高いと
き、蒸発装置は図１および図２に示す実施例と同様に一
方向弁を閉じた状態で作動する。周囲温度が麻酔剤の沸
点より低いとき、一方向弁４２が開き、蒸発装置は層流
制限器８が温度制御されるバイパス型の通常の蒸発装置
として働く。かくして、層流制限器８は変化する蒸気圧
を補償する。Finally, referring to FIG. 6, the evaporator 1 has a bypass passage 40 extending from the passage 6 to the evaporation chamber 12 adjacent to the inlet 2. In this passage 40, a one-way valve 42 is positioned. Furthermore, a constant back pressure regulator 44 is positioned in the passage 6 as shown. If it is necessary to use an anesthetic whose boiling point is above ambient temperature, for example within the normal operating temperature range of 15 ° C. to 35 ° C., e.g. 1 and the embodiment shown in FIG. 2 operates with the one-way valve closed. When the ambient temperature is lower than the boiling point of the anesthetic, the one-way valve 42 opens and the evaporator acts as a conventional evaporator of the bypass type in which the laminar flow restrictor 8 is temperature controlled. Thus, the laminar flow restrictor 8 compensates for the changing vapor pressure.
【図１】ＩＳＯ／ＢＳＩ符号を使用した本発明による麻
酔剤蒸発装置の概略図である。FIG. 1 is a schematic view of an anesthetic evaporator according to the present invention using ISO / BSI codes.
【図２】図４に示すようにヒータを追加した場合の図１
の麻酔剤蒸発装置の部分横断面側面図である。FIG. 2 shows a case where a heater is added as shown in FIG.
FIG. 2 is a partial cross-sectional side view of the anesthetic evaporator of FIG.
【図３】図１の麻酔剤蒸発装置の変更例の概略図であ
る。FIG. 3 is a schematic view of a modification of the anesthetic evaporator of FIG. 1;
【図４】図１に示すような更らに変更した麻酔剤蒸発装
置の概略図である。FIG. 4 is a schematic view of a further modified anesthetic vaporizer as shown in FIG.
【図５】図１に示すような更に変更した麻酔剤蒸発装置
の概略図である。FIG. 5 is a schematic view of a further modified anesthetic evaporator as shown in FIG. 1;
【図６】図１の麻酔剤蒸発装置の更らに他の変更例の概
略図である。FIG. 6 is a schematic view of still another modification of the anesthetic vaporizer of FIG. 1;
１ 麻酔剤蒸発装置 ２ 入口 ４ 出口 ６ 通路 ８ 層流制限装置 １０ 第２通路 １２ 蒸発室 １４ 平衡調整器 ２０ ダイヤフラム ２２ 弁ガサ ２４ 弁座 ２８ 制御弁 ３２ ヒータ DESCRIPTION OF SYMBOLS 1 Anesthetic evaporator 2 Inlet 4 Outlet 6 Passage 8 Laminar flow restrictor 10 Second passage 12 Evaporation chamber 14 Balance adjuster 20 Diaphragm 22 Valve gas 24 Valve seat 28 Control valve 32 Heater
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 米国特許3841560（ＵＳ，Ａ) 米国特許3703172（ＵＳ，Ａ) 英国特許出願公開2217609（ＧＢ，Ａ) 英国特許1299311（ＧＢ，Ｂ) (58)調査した分野(Int.Cl.7，ＤＢ名) A61M 16/00 - 16/18 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References US Patent 3841560 (US, A) US Patent 3703172 (US, A) UK Patent Application No. 2217609 (GB, A) UK Patent 1293911 (GB, B) (58) Search Field (Int.Cl. 7 , DB name) A61M 16/00-16/18
Claims (4)
およびガス状麻酔剤を患者に送給するための出口と、入
口と出口との間に延び、流れ制限装置が配置された第１
通路と、第１通路における前記流れ制限装置の上流側の
位置と調整器との間に延びる第２通路と、麻酔剤を収容
する蒸発室と、該蒸発室から前記流れ制限装置の下流側
の位置の第１通路に延びる第３通路と、ガス状麻酔剤が
前記第３通路を通って流れるときに該ガス状麻酔剤の圧
力を制御する調整器とを備え、該第３通路は流量制御弁
を有することを特徴とする麻酔剤蒸発装置。An inlet for a carrier gas, an outlet for delivering a carrier gas and a gaseous anesthetic to a patient, a first extending between the inlet and the outlet, wherein a first flow restrictor is disposed.
A passage, a second passage extending between a position upstream of the flow restriction device in the first passage and the regulator, an evaporation chamber containing an anesthetic, and a downstream of the flow restriction device from the evaporation chamber. A third passage extending to the first passage in position, and a regulator for controlling the pressure of the gaseous anesthetic when the gaseous anesthetic flows through the third passage, the third passage having a flow control. An anesthetic evaporator comprising a valve.
の作動流量範囲にわたって実質的に層流装置であること
を特徴とする請求項１に記載の麻酔剤蒸発装置。2. The anesthetic evaporator of claim 1, wherein the flow restrictor and the flow control valve are substantially laminar over their operating flow ranges.
整器を更に備えたことを特徴とする請求項１に記載の麻
酔剤蒸発装置。3. The anesthetic evaporator according to claim 1, further comprising a second regulator provided in series with the regulator.
第１の調整器との間に配置される減圧調整器であること
を特徴とする請求項３に記載された麻酔剤蒸発装置。4. The method of claim 3, wherein the second regulator is a decompression regulator disposed between the evaporating chamber and the first regulator. apparatus.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB90004219 | 1990-01-09 | ||
| GB9000421A GB2239807A (en) | 1990-01-09 | 1990-01-09 | Anaesthetic vaporiser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04269971A JPH04269971A (en) | 1992-09-25 |
| JP3179115B2 true JP3179115B2 (en) | 2001-06-25 |
Family
ID=10668996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00103591A Expired - Lifetime JP3179115B2 (en) | 1990-01-09 | 1991-01-09 | Improved evaporator |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5146915A (en) |
| EP (1) | EP0438218B1 (en) |
| JP (1) | JP3179115B2 (en) |
| CA (1) | CA2033770C (en) |
| DE (1) | DE69112435T2 (en) |
| GB (1) | GB2239807A (en) |
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| JP2014096340A (en) * | 2012-11-12 | 2014-05-22 | Soc Corp | Current fuse |
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-
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- 1990-01-09 GB GB9000421A patent/GB2239807A/en not_active Withdrawn
-
1991
- 1991-01-08 DE DE69112435T patent/DE69112435T2/en not_active Expired - Lifetime
- 1991-01-08 CA CA002033770A patent/CA2033770C/en not_active Expired - Fee Related
- 1991-01-08 US US07/638,861 patent/US5146915A/en not_active Expired - Lifetime
- 1991-01-08 EP EP91300104A patent/EP0438218B1/en not_active Expired - Lifetime
- 1991-01-09 JP JP00103591A patent/JP3179115B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014096340A (en) * | 2012-11-12 | 2014-05-22 | Soc Corp | Current fuse |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2033770A1 (en) | 1991-07-10 |
| DE69112435T2 (en) | 1996-02-01 |
| GB9000421D0 (en) | 1990-03-07 |
| JPH04269971A (en) | 1992-09-25 |
| EP0438218B1 (en) | 1995-08-30 |
| DE69112435D1 (en) | 1995-10-05 |
| EP0438218A2 (en) | 1991-07-24 |
| GB2239807A (en) | 1991-07-17 |
| US5146915A (en) | 1992-09-15 |
| EP0438218A3 (en) | 1992-03-25 |
| CA2033770C (en) | 1994-07-19 |
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